:root{
  --ink:#141524;
  --ink-soft:#3b3d52;
  --muted:#6a6d84;
  --line:#e6e4ef;
  --paper:#fdfbf7;
  --card:#ffffff;
  --brand:#ff3d68;
  --brand-2:#ff7a3d;
  --brand-3:#7c3aed;
  --deep:#1b1140;
  --shadow:0 18px 44px rgba(27,17,64,.10);
  --shadow-sm:0 8px 20px rgba(27,17,64,.07);
  --radius:20px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;
  color:var(--ink);
  background:
    radial-gradient(circle at 12% 6%, rgba(255,122,61,.18), transparent 42%),
    radial-gradient(circle at 88% 14%, rgba(124,58,237,.16), transparent 46%),
    radial-gradient(circle at 50% 96%, rgba(255,61,104,.12), transparent 44%),
    linear-gradient(180deg,#fffdfa 0%,#fdf6f4 40%,#f7f4ff 74%,#fdfbf7 100%);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 22px}
section{position:relative}
.section-pad{padding:74px 0}
@media(max-width:768px){.section-pad{padding:52px 0}}

/* ============ header ============ */
.site-header{
  position:sticky;top:0;z-index:120;
  background:rgba(255,253,250,.86);
  backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(27,17,64,.07);
}
.nav-wrap{
  max-width:1200px;margin:0 auto;padding:0 22px;
  display:flex;align-items:center;justify-content:space-between;
  gap:18px;min-height:70px;
}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand .ai-page-logo{width:132px}
.brand-text{font-weight:800;font-size:1rem;letter-spacing:.02em;color:var(--deep)}
.brand-text span{color:var(--brand)}
.nav-links{display:flex;align-items:center;gap:0;flex-wrap:wrap}
.nav-links a{
  display:block;padding:9px 11px;font-size:.9rem;font-weight:600;
  color:var(--ink-soft);border-radius:10px;transition:color .22s,background .22s,transform .22s;
  white-space:nowrap;
}
.nav-links a:hover{color:#fff;background:linear-gradient(120deg,var(--brand),var(--brand-2));transform:translateY(-1px)}
.nav-cta{
  flex-shrink:0;padding:9px 20px;border-radius:999px;
  background:linear-gradient(120deg,var(--brand),var(--brand-2));
  color:#fff;font-weight:700;font-size:.88rem;
  box-shadow:0 10px 22px rgba(255,61,104,.28);
  transition:transform .22s,box-shadow .22s;
}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 14px 28px rgba(255,61,104,.36)}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  background:#fff;align-items:center;justify-content:center;cursor:pointer;flex-direction:column;gap:5px;
}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--ink);border-radius:2px;transition:.25s}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

@media(max-width:1080px){
  .nav-links{display:none;width:100%;flex-direction:column;align-items:stretch;gap:2px;padding:8px 0 16px;border-top:1px solid var(--line);margin-top:4px}
  .nav-links.open{display:flex}
  .nav-links a{padding:11px 14px;font-size:.95rem}
  .nav-wrap{flex-wrap:wrap;padding-top:12px;padding-bottom:12px}
  .nav-toggle{display:flex}
  .nav-cta{order:2}
}

/* ============ hero ============ */
.hero{padding:64px 0 70px;overflow:hidden}
.hero-inner{display:grid;grid-template-columns:1.15fr .85fr;gap:46px;align-items:center}
@media(max-width:940px){.hero-inner{grid-template-columns:1fr;gap:34px}}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 16px;border-radius:999px;font-size:.82rem;font-weight:700;
  color:#b3164a;background:rgba(255,61,104,.10);border:1px solid rgba(255,61,104,.22);
  margin-bottom:22px;
}
.hero-eyebrow i{width:7px;height:7px;border-radius:50%;background:var(--brand);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(255,61,104,.5)}50%{box-shadow:0 0 0 7px rgba(255,61,104,0)}}
h1{font-size:2.75rem;line-height:1.22;letter-spacing:-.02em;color:var(--deep);font-weight:900}
h1 .hot{color:var(--brand)}
h1 .violet{color:var(--brand-3)}
@media(max-width:768px){h1{font-size:2rem}}
.hero-desc{margin-top:20px;font-size:1.05rem;color:var(--ink-soft);max-width:600px}
.hero-actions{margin-top:32px;display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:15px 34px;border-radius:999px;font-weight:800;font-size:1rem;color:#fff;
  background:linear-gradient(120deg,var(--brand) 0%,var(--brand-2) 100%);
  box-shadow:0 16px 32px rgba(255,61,104,.30);
  transition:transform .24s,box-shadow .24s,filter .24s;
}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 22px 40px rgba(255,61,104,.38);filter:brightness(1.04)}
.btn-primary:active{transform:translateY(0) scale(.985)}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;
  padding:15px 30px;border-radius:999px;font-weight:700;font-size:1rem;
  color:var(--deep);background:#fff;border:1.5px solid rgba(27,17,64,.14);
  transition:border-color .24s,transform .24s,box-shadow .24s;
}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-3px);box-shadow:var(--shadow-sm)}
.hero-tags{margin-top:30px;display:flex;flex-wrap:wrap;gap:9px}
.hero-tags span{
  font-size:.8rem;font-weight:600;color:var(--ink-soft);
  padding:6px 13px;border-radius:8px;background:rgba(255,255,255,.85);
  border:1px solid var(--line);
}
.hero-panel{
  position:relative;border-radius:26px;padding:30px;
  background:linear-gradient(160deg,#1b1140 0%,#2f1a5e 55%,#4a1c58 100%);
  box-shadow:0 28px 60px rgba(27,17,64,.28);
  color:#fff;overflow:hidden;
}
.hero-panel::before{
  content:"";position:absolute;width:260px;height:260px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,122,61,.55),transparent 70%);
  top:-90px;right:-70px;filter:blur(6px);
}
.hero-panel::after{
  content:"";position:absolute;width:220px;height:220px;border-radius:50%;
  background:radial-gradient(circle,rgba(124,58,237,.6),transparent 70%);
  bottom:-80px;left:-60px;filter:blur(6px);
}
.hero-panel h2{position:relative;font-size:1.05rem;font-weight:700;color:#fff;margin-bottom:18px;letter-spacing:.02em}
.stat-grid{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:14px}
.stat-item{
  padding:16px 15px;border-radius:16px;
  background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.16);
  transition:background .24s,transform .24s;
}
.stat-item:hover{background:rgba(255,255,255,.16);transform:translateY(-3px)}
.stat-item b{display:block;font-size:1.5rem;font-weight:900;color:#fff;line-height:1.2}
.stat-item b em{font-style:normal;font-size:.9rem;color:#ffb28f;margin-left:2px}
.stat-item span{display:block;font-size:.78rem;color:rgba(255,255,255,.72);margin-top:5px}
.panel-note{position:relative;margin-top:18px;font-size:.8rem;color:rgba(255,255,255,.66);line-height:1.65}

/* ============ section heading ============ */
.sec-head{max-width:760px;margin:0 auto 44px;text-align:center}
.sec-label{
  display:inline-block;font-size:.78rem;font-weight:800;letter-spacing:.16em;
  color:var(--brand);text-transform:uppercase;margin-bottom:12px;
}
.sec-head h2{font-size:2rem;font-weight:900;color:var(--deep);line-height:1.3;letter-spacing:-.01em}
.sec-head p{margin-top:14px;color:var(--muted);font-size:1rem}
@media(max-width:768px){.sec-head h2{font-size:1.55rem}.sec-head p{font-size:.94rem}}

/* ============ about ============ */
.about-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:38px;align-items:start}
@media(max-width:940px){.about-grid{grid-template-columns:1fr}}
.about-copy p{color:var(--ink-soft);margin-bottom:16px;font-size:.98rem}
.about-points{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:24px}
@media(max-width:560px){.about-points{grid-template-columns:1fr}}
.point{
  padding:16px 18px;border-radius:14px;background:#fff;border:1px solid var(--line);
  box-shadow:var(--shadow-sm);transition:transform .24s,box-shadow .24s,border-color .24s;
}
.point:hover{transform:translateY(-4px);border-color:rgba(255,61,104,.35);box-shadow:var(--shadow)}
.point b{display:block;font-size:.94rem;color:var(--deep);margin-bottom:5px}
.point span{font-size:.82rem;color:var(--muted);line-height:1.6}
.about-side{
  border-radius:22px;padding:26px;
  background:linear-gradient(150deg,rgba(255,61,104,.07),rgba(124,58,237,.09));
  border:1px solid rgba(124,58,237,.16);
}
.about-side h3{font-size:1.05rem;color:var(--deep);margin-bottom:16px}
.about-list{list-style:none;display:grid;gap:12px}
.about-list li{
  display:flex;gap:10px;align-items:flex-start;font-size:.88rem;color:var(--ink-soft);
  padding-bottom:12px;border-bottom:1px dashed rgba(27,17,64,.10);
}
.about-list li:last-child{border-bottom:none;padding-bottom:0}
.about-list li::before{content:"";flex-shrink:0;width:8px;height:8px;margin-top:8px;border-radius:50%;background:linear-gradient(120deg,var(--brand),var(--brand-2))}

/* ============ services ============ */
.svc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
@media(max-width:980px){.svc-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:620px){.svc-grid{grid-template-columns:1fr}}
.svc-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;transition:transform .26s,box-shadow .26s,border-color .26s;
  display:flex;flex-direction:column;
}
.svc-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:rgba(255,61,104,.30)}
.svc-icon{
  width:46px;height:46px;border-radius:13px;display:flex;align-items:center;justify-content:center;
  margin-bottom:16px;font-weight:900;font-size:1.05rem;color:#fff;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  box-shadow:0 8px 18px rgba(255,61,104,.26);
}
.svc-card:nth-child(3n+2) .svc-icon{background:linear-gradient(135deg,var(--brand-3),#b06bff);box-shadow:0 8px 18px rgba(124,58,237,.26)}
.svc-card:nth-child(3n) .svc-icon{background:linear-gradient(135deg,#ff8a3d,#ffc23d);box-shadow:0 8px 18px rgba(255,138,61,.26)}
.svc-card h3{font-size:1.05rem;color:var(--deep);margin-bottom:8px}
.svc-card p{font-size:.87rem;color:var(--muted);line-height:1.7;flex:1}

/* ============ models strip ============ */
.model-strip{
  border-radius:24px;padding:32px;
  background:linear-gradient(140deg,#1b1140,#3d1b6e 60%,#5a1e5c);
  color:#fff;overflow:hidden;position:relative;
}
.model-strip::after{
  content:"";position:absolute;inset:auto -60px -100px auto;width:280px;height:280px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,122,61,.4),transparent 70%);
}
.model-strip h2{font-size:1.45rem;margin-bottom:10px;position:relative;color:#fff}
.model-strip p{font-size:.9rem;color:rgba(255,255,255,.72);margin-bottom:22px;position:relative;max-width:720px}
.model-tags{position:relative;display:flex;flex-wrap:wrap;gap:9px}
.model-tags span{
  font-size:.8rem;font-weight:600;padding:6px 14px;border-radius:999px;
  background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.20);color:#fff;
  transition:background .22s,transform .22s;
}
.model-tags span:hover{background:rgba(255,122,61,.42);transform:translateY(-2px)}

/* ============ workflow ============ */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
@media(max-width:900px){.flow{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.flow{grid-template-columns:1fr}}
.flow-step{
  background:#fff;border-radius:16px;border:1px solid var(--line);padding:22px 20px;
  position:relative;transition:transform .24s,box-shadow .24s;
}
.flow-step:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.flow-step b{
  display:flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:11px;
  font-size:.94rem;font-weight:900;color:#fff;margin-bottom:14px;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
}
.flow-step:nth-child(2) b{background:linear-gradient(135deg,#ff8a3d,#ffc23d)}
.flow-step:nth-child(3) b{background:linear-gradient(135deg,var(--brand-3),#b06bff)}
.flow-step:nth-child(4) b{background:linear-gradient(135deg,#0ea5b7,#4ad0c0)}
.flow-step h3{font-size:.98rem;color:var(--deep);margin-bottom:7px}
.flow-step p{font-size:.83rem;color:var(--muted);line-height:1.65}

/* ============ scenarios tile ============ */
.tile-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
@media(max-width:980px){.tile-grid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:680px){.tile-grid{grid-template-columns:repeat(2,1fr)}}
.tile{
  padding:16px 15px;border-radius:14px;background:#fff;border:1px solid var(--line);
  font-size:.86rem;font-weight:600;color:var(--ink-soft);line-height:1.5;
  transition:transform .22s,border-color .22s,color .22s,box-shadow .22s;
}
.tile:hover{transform:translateY(-4px);color:var(--brand);border-color:rgba(255,61,104,.35);box-shadow:var(--shadow-sm)}

/* ============ compare ============ */
.compare-wrap{background:#fff;border-radius:22px;border:1px solid var(--line);overflow:hidden;box-shadow:var(--shadow-sm)}
.compare-scroll{overflow-x:auto}
table.compare{width:100%;border-collapse:collapse;min-width:640px}
table.compare th,table.compare td{padding:15px 18px;text-align:left;font-size:.88rem;border-bottom:1px solid var(--line)}
table.compare thead th{background:linear-gradient(120deg,rgba(255,61,104,.08),rgba(124,58,237,.08));color:var(--deep);font-weight:800;font-size:.9rem}
table.compare tbody tr:hover{background:rgba(255,61,104,.04)}
table.compare td:first-child{font-weight:700;color:var(--deep);white-space:nowrap}
table.compare td.hl{color:var(--brand);font-weight:700}
.rate-box{
  margin-top:24px;display:flex;flex-wrap:wrap;gap:22px;align-items:center;justify-content:space-between;
  background:linear-gradient(120deg,#1b1140,#4a1c58);border-radius:20px;padding:26px 30px;color:#fff;
}
.rate-box .stars{font-size:1.35rem;letter-spacing:.16em;color:#ffc23d}
.rate-box .rate-score{font-size:2.4rem;font-weight:900;line-height:1;color:#fff}
.rate-box .rate-score small{font-size:.9rem;font-weight:600;color:rgba(255,255,255,.65);margin-left:4px}
.rate-txt{flex:1;min-width:240px;font-size:.9rem;color:rgba(255,255,255,.78)}

/* ============ stats strip ============ */
.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
@media(max-width:860px){.metric-grid{grid-template-columns:repeat(2,1fr)}}
.metric{
  background:#fff;border-radius:16px;padding:24px 20px;text-align:center;
  border:1px solid var(--line);box-shadow:var(--shadow-sm);
  transition:transform .24s,box-shadow .24s;
}
.metric:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.metric b{display:block;font-size:1.85rem;font-weight:900;color:var(--brand);line-height:1.2}
.metric span{display:block;font-size:.84rem;color:var(--muted);margin-top:7px}

/* ============ network ============ */
.net-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
@media(max-width:860px){.net-grid{grid-template-columns:1fr}}
.net-card{
  padding:24px;border-radius:18px;background:#fff;border:1px solid var(--line);
  transition:transform .24s,box-shadow .24s;
}
.net-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.net-card h3{font-size:1rem;color:var(--deep);margin-bottom:8px}
.net-card p{font-size:.85rem;color:var(--muted);line-height:1.7}

/* ============ cases ============ */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
@media(max-width:940px){.case-grid{grid-template-columns:1fr}}
.case-card{
  border-radius:20px;overflow:hidden;background:#fff;border:1px solid var(--line);
  box-shadow:var(--shadow-sm);transition:transform .26s,box-shadow .26s;
  display:flex;flex-direction:column;
}
.case-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.case-media{overflow:hidden;background:#f2eef6}
.case-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .5s}
.case-card:hover .case-media img{transform:scale(1.05)}
.case-body{padding:20px}
.case-body h3{font-size:1rem;color:var(--deep);margin-bottom:8px}
.case-body p{font-size:.85rem;color:var(--muted);line-height:1.65}
.case-meta{margin-top:13px;display:flex;flex-wrap:wrap;gap:7px}
.case-meta span{font-size:.75rem;font-weight:600;color:var(--brand-3);background:rgba(124,58,237,.09);padding:4px 10px;border-radius:7px}

/* ============ banner showcase ============ */
.banner-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
@media(max-width:760px){.banner-grid{grid-template-columns:1fr}}
.banner-item{border-radius:18px;overflow:hidden;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow-sm)}
.banner-item img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .5s}
.banner-item:hover img{transform:scale(1.04)}

/* ============ token price ============ */
.price-wrap{
  display:grid;grid-template-columns:1fr 1fr;gap:20px;
}
@media(max-width:860px){.price-wrap{grid-template-columns:1fr}}
.price-card{
  background:#fff;border-radius:20px;border:1px solid var(--line);padding:28px;
  box-shadow:var(--shadow-sm);transition:transform .26s,box-shadow .26s;
}
.price-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.price-card h3{font-size:1.05rem;color:var(--deep);margin-bottom:6px}
.price-card .price-sub{font-size:.82rem;color:var(--muted);margin-bottom:18px}
.price-row{display:flex;justify-content:space-between;align-items:center;padding:11px 0;border-bottom:1px dashed rgba(27,17,64,.10);font-size:.88rem;color:var(--ink-soft)}
.price-row:last-child{border-bottom:none}
.price-row b{color:var(--brand);font-weight:800}
.price-note{margin-top:16px;font-size:.8rem;color:var(--muted);line-height:1.6}

/* ============ reviews ============ */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
@media(max-width:940px){.review-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:620px){.review-grid{grid-template-columns:1fr}}
.review{
  background:#fff;border-radius:18px;border:1px solid var(--line);padding:24px;
  box-shadow:var(--shadow-sm);transition:transform .24s,box-shadow .24s;
  display:flex;flex-direction:column;
}
.review:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.review .stars{color:#ffb400;font-size:.95rem;letter-spacing:.1em;margin-bottom:12px}
.review p{font-size:.88rem;color:var(--ink-soft);line-height:1.75;flex:1}
.review-user{margin-top:16px;padding-top:14px;border-top:1px solid var(--line);display:flex;align-items:center;gap:10px}
.avatar{
  width:38px;height:38px;border-radius:50%;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:.9rem;color:#fff;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
}
.review:nth-child(2n) .avatar{background:linear-gradient(135deg,var(--brand-3),#b06bff)}
.review:nth-child(3n) .avatar{background:linear-gradient(135deg,#ff8a3d,#ffc23d)}
.review-user b{display:block;font-size:.85rem;color:var(--deep)}
.review-user span{display:block;font-size:.76rem;color:var(--muted)}

/* ============ faq ============ */
.faq-list{max-width:900px;margin:0 auto;display:grid;gap:12px}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;
  transition:border-color .24s,box-shadow .24s;
}
.faq-item.open{border-color:rgba(255,61,104,.32);box-shadow:var(--shadow-sm)}
.faq-q{
  width:100%;text-align:left;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:17px 20px;font-size:.94rem;font-weight:700;color:var(--deep);
  background:none;border:none;cursor:pointer;font-family:inherit;line-height:1.6;
}
.faq-q .ico{
  flex-shrink:0;width:24px;height:24px;border-radius:8px;position:relative;
  background:rgba(255,61,104,.10);transition:background .24s,transform .3s;
}
.faq-q .ico::before,.faq-q .ico::after{
  content:"";position:absolute;background:var(--brand);border-radius:2px;top:50%;left:50%;
  transform:translate(-50%,-50%);transition:transform .3s,opacity .3s;
}
.faq-q .ico::before{width:11px;height:2px}
.faq-q .ico::after{width:2px;height:11px}
.faq-item.open .faq-q .ico::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .34s ease}
.faq-a p{padding:0 20px 18px;font-size:.87rem;color:var(--muted);line-height:1.8}

/* ============ articles ============ */
.art-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
@media(max-width:920px){.art-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:620px){.art-grid{grid-template-columns:1fr}}
.art-card{
  display:block;background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px;
  transition:transform .24s,box-shadow .24s,border-color .24s;
}
.art-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:rgba(124,58,237,.30)}
.art-card h3{font-size:.96rem;color:var(--deep);margin-bottom:8px;line-height:1.55}
.art-card p{font-size:.82rem;color:var(--muted);line-height:1.65}
.art-card .more{margin-top:12px;font-size:.8rem;font-weight:700;color:var(--brand)}

/* ============ form ============ */
.form-wrap{
  display:grid;grid-template-columns:1fr 1.1fr;gap:30px;align-items:start;
}
@media(max-width:900px){.form-wrap{grid-template-columns:1fr}}
.contact-info{
  background:linear-gradient(155deg,#1b1140,#3d1b6e 60%,#5a1e5c);border-radius:22px;
  padding:34px;color:#fff;position:relative;overflow:hidden;
}
.contact-info::after{
  content:"";position:absolute;width:240px;height:240px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,122,61,.4),transparent 70%);
  bottom:-110px;right:-70px;
}
.contact-info h3{font-size:1.2rem;color:#fff;margin-bottom:8px;position:relative}
.contact-info>p{font-size:.86rem;color:rgba(255,255,255,.72);margin-bottom:22px;position:relative}
.contact-list{list-style:none;position:relative;display:grid;gap:14px}
.contact-list li{font-size:.87rem;color:rgba(255,255,255,.86);display:flex;gap:10px;align-items:flex-start;line-height:1.6}
.contact-list li strong{display:block;font-size:.78rem;color:rgba(255,255,255,.55);font-weight:600;margin-bottom:2px}
.qr-box{position:relative;margin-top:24px;display:flex;align-items:center;gap:14px}
.qr-box img{width:96px;height:96px;border-radius:12px;background:#fff;padding:5px;object-fit:contain}
.qr-box span{font-size:.8rem;color:rgba(255,255,255,.72);line-height:1.6}

.form-card{
  background:#fff;border:1px solid var(--line);border-radius:22px;padding:32px;
  box-shadow:var(--shadow-sm);
}
.form-card h3{font-size:1.1rem;color:var(--deep);margin-bottom:6px}
.form-card .form-sub{font-size:.84rem;color:var(--muted);margin-bottom:22px}
.field{margin-bottom:16px}
.field label{display:block;font-size:.83rem;font-weight:700;color:var(--ink-soft);margin-bottom:7px}
.field input,.field select,.field textarea{
  width:100%;padding:12px 14px;border-radius:10px;border:1px solid var(--line);
  background:#fcfbfe;font-size:.9rem;color:var(--ink);font-family:inherit;
  transition:border-color .22s,box-shadow .22s,background .22s;
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);background:#fff;
  box-shadow:0 0 0 3px rgba(255,61,104,.12);
}
.field textarea{resize:vertical;min-height:100px;line-height:1.6}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media(max-width:520px){.form-row{grid-template-columns:1fr}}
.btn-submit{
  width:100%;padding:14px;border-radius:12px;border:none;cursor:pointer;
  font-size:.98rem;font-weight:800;color:#fff;font-family:inherit;
  background:linear-gradient(120deg,var(--brand),var(--brand-2));
  box-shadow:0 14px 26px rgba(255,61,104,.26);
  transition:transform .22s,box-shadow .22s,filter .22s;
}
.btn-submit:hover{transform:translateY(-2px);box-shadow:0 18px 32px rgba(255,61,104,.34);filter:brightness(1.04)}
.btn-submit:active{transform:translateY(0) scale(.99)}

/* ============ friends ============ */
.friend-links{
  background:#fff;border:1px solid var(--line);border-radius:18px;padding:26px;
  box-shadow:var(--shadow-sm);
}
.friend-links h3{font-size:1rem;color:var(--deep);margin-bottom:16px;text-align:center}
.link-tags{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.link-tags a{
  font-size:.83rem;font-weight:600;color:var(--ink-soft);padding:7px 15px;
  border-radius:999px;background:#f7f4ff;border:1px solid var(--line);
  transition:color .22s,background .22s,transform .22s,border-color .22s;
}
.link-tags a:hover{color:#fff;background:linear-gradient(120deg,var(--brand),var(--brand-2));border-color:transparent;transform:translateY(-2px)}

/* ============ footer ============ */
.site-footer{
  background:#171029;color:rgba(255,255,255,.72);
  padding:44px 0 26px;margin-top:0;
}
.footer-top{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:34px;padding-bottom:28px;border-bottom:1px solid rgba(255,255,255,.10)}
@media(max-width:820px){.footer-top{grid-template-columns:1fr;gap:24px}}
.footer-brand .ai-page-logo{width:132px;margin-bottom:14px;filter:brightness(0) invert(1)}
.footer-brand p{font-size:.84rem;line-height:1.75;color:rgba(255,255,255,.62);max-width:330px}
.footer-col h4{font-size:.92rem;color:#fff;margin-bottom:14px;font-weight:700}
.footer-col ul{list-style:none;display:grid;gap:9px}
.footer-col ul li{font-size:.83rem;color:rgba(255,255,255,.62);line-height:1.6}
.footer-col ul li a{color:rgba(255,255,255,.72);transition:color .2s}
.footer-col ul li a:hover{color:#ff8f6b}
.footer-bottom{padding-top:20px;text-align:center;font-size:.78rem;color:rgba(255,255,255,.48);line-height:1.8}
.footer-bottom a{color:rgba(255,255,255,.66)}
.footer-bottom a:hover{color:#ff8f6b}

/* ============ float tools ============ */
.float-tools{position:fixed;right:18px;bottom:26px;z-index:150;display:flex;flex-direction:column;gap:10px}
.float-btn{
  width:48px;height:48px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-sm);cursor:pointer;
  color:var(--deep);font-size:.72rem;font-weight:800;transition:transform .22s,box-shadow .22s,background .22s,color .22s;
  text-align:center;line-height:1.2;
}
.float-btn:hover{transform:translateY(-3px);box-shadow:var(--shadow);background:linear-gradient(120deg,var(--brand),var(--brand-2));color:#fff}
.float-btn.top{opacity:0;pointer-events:none}
.float-btn.top.show{opacity:1;pointer-events:auto}

/* ============ kefu modal ============ */
.kefu-modal{
  position:fixed;inset:0;z-index:200;display:none;align-items:center;justify-content:center;
  background:rgba(23,16,41,.55);backdrop-filter:blur(4px);padding:20px;
}
.kefu-modal.open{display:flex}
.kefu-box{
  background:#fff;border-radius:20px;padding:26px;max-width:320px;width:100%;text-align:center;
  box-shadow:0 30px 60px rgba(0,0,0,.24);animation:popIn .26s ease;
}
@keyframes popIn{from{opacity:0;transform:scale(.94) translateY(12px)}to{opacity:1;transform:scale(1) translateY(0)}}
.kefu-box h3{font-size:1.02rem;color:var(--deep);margin-bottom:14px}
.kefu-box img{width:190px;height:190px;margin:0 auto 14px;border-radius:14px;border:1px solid var(--line);object-fit:contain}
.kefu-box p{font-size:.82rem;color:var(--muted);line-height:1.7}
.kefu-close{
  margin-top:16px;width:100%;padding:11px;border-radius:10px;border:none;cursor:pointer;
  background:#f2eef6;color:var(--ink-soft);font-weight:700;font-size:.88rem;font-family:inherit;
  transition:background .2s;
}
.kefu-close:hover{background:#e6dff0}

/* ============ reveal ============ */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:translateY(0)}
@media(prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}
.divider-line{height:1px;background:linear-gradient(90deg,transparent,rgba(27,17,64,.14),transparent);margin:0}